Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 802 491
2) Placement test : grammar for beginners (lucile83) 6 026 273
3) A/AN (webmaster) 5 387 052
4) Auxiliary BE (webmaster) 3 234 914
5) Present continuous (webmaster) 3 013 027
6) Present simple (webmaster) 2 951 579
7) Present simple (webmaster) 2 609 723
8) Present continuous (webmaster) 2 455 156
9) Adjectives (webmaster) 2 100 095
10) A/an (anonyme) 2 028 240
11) Present perfect simple (webmaster) 1 662 352
12) Preterite (webmaster) 1 651 677
13) Vocabulary - Placement test (bridg) 1 625 078
14) Preterite (webmaster) 1 461 814
15) Short placement test (webmaster) 1 448 545
16) To be (bridg) 1 413 640
17) Present perfect (webmaster) 1 359 219
18) What time is it? (webmaster) 1 354 905
19) The alphabet in English (webmaster) 1 328 030
20) Adjectives (lucile83) 1 224 101
21) What time is it? (webmaster) 1 216 441
22) Numbers (webmaster) 1 192 354
23) 'A' ou 'An' (anonyme) 1 184 970
24) Two presents: present continuous, present simple (webmaster) 1 157 106
25) To be (bridg) 1 151 246
26) Comparatives / Superlatives (webmaster) 1 119 512
27) Numbers (webmaster) 1 077 294
28) CAN / MUST (webmaster) 1 062 470
29) THE/ A / AN / nothing (webmaster) 1 040 979
30) Comparatives (webmaster) 1 010 846
31) Family life (bridg) 1 006 243
32) Numbers > 100 (webmaster) 990 028
33) Future (going to/will/present continuous) (anonyme) 969 766
34) Plural (webmaster) 962 241
35) Adjectives (anonyme) 879 502
36) Superlatives (webmaster) 879 286
37) Simple present (bridg) 859 410
38) Spelled words N°1 (bridg) 855 669
39) Placement test beginners: Check your spelling (lucile83) 832 816
40) Introducing oneself (webmaster) 830 312
41) Adverbs of frequency (lucile83) 824 151
42) Present simple (lucile83) 789 963
43) Family (bridg) 788 993
44) General test-End of high school / Beginning of university (webmaster) 787 053
45) Frequency adverbs (webmaster) 781 632
46) Present BE + Ving (bridg) 770 902
47) Passive form (lucile83) 740 261
48) Genitive (webmaster) 726 281
49) Family tree (anonyme) 723 220
50) Preterite: simple or continuous? (webmaster) 721 838
51) Placement test (beginners) (lili73) 706 949
52) Past simple or present perfect (lucile83) 702 096
53) Future (webmaster) 678 346
54) Present perfect simple (bridg) 670 179
55) 2 Preterites (webmaster) 666 413
56) Preterite (webmaster) 626 382
57) List of 200 irregular verbs and audio (bridg) 620 377
58) Modals (webmaster) 615 212
59) Spelled words N°2 (bridg) 613 008
60) Modals (webmaster) 612 136
61) Height (webmaster) 608 691
62) Articles a / an / the (lucile83) 597 054
63) Plural forms (bridg) 581 542
64) Nationalities (webmaster) 577 509
65) Past continuous / Past simple (anonyme) 575 070
66) Irregular plurals (bridg) 557 553
67) Preterite (bridg) 555 262
68) Two presents: simple and continuous (webmaster) 553 597
69) Superlatives (frapedur) 547 494
70) Vocabulary: greeting people (here4u) 536 866
71) Give your opinion (bridg) 535 362
72) Present simple or continuous (lucile83) 520 705
73) Adverbs of Frequency (bridg) 519 842
74) Present perfect / preterite ? (anonyme) 516 511
75) Possessive case (anonyme) 483 658
76) Countries & nationalities (bridg) 476 992
77) Past tenses (bridg) 474 308
78) 'The' or nothing? (webmaster) 473 143
79) Introducing oneself (easy) (webmaster) 472 946
80) Passive voice (webmaster) 466 853
81) Present Simple vs. Past Simple (anonyme) 466 800
82) Questions : how to ask them (lucile83) 451 253
83) Relative pronouns (webmaster) 448 771
84) General Test II / End of high school / Beginning of universi (webmaster) 448 552
85) IN, ON, AT or TO? (webmaster) 448 381
86) How to pronounce the final -ED? (past simple) (webmaster) 444 100
87) Comparative of superiority (lucile83) 443 303
88) Relative clauses (webmaster) 425 701
89) Sounds: [h] (webmaster) 421 614
90) Comparative (anonyme) 417 544
91) Past simple (anonyme) 406 872
92) A/an/Ø (bridg) 401 266
93) Future simple (lucile83) 400 311
94) Conditional (webmaster) 394 757
95) This / That / These / Those (webmaster) 394 432
96) Passive voice (anonyme) 393 802
97) Comparing (webmaster) 389 878
98) Can / could/ may/ might (woodyrun) 382 486
99) Present perfect or past tense (anonyme) 381 539
100) Much, many, little and few (felin) 377 385
101) Preterite continuous (BE + -ING) (webmaster) 373 572
102) Personal pronouns (anonyme) 372 802
103) Genitive case (bridg) 370 693
104) Some, any, no, enough, too/too much/too many (webmaster) 369 707
105) Irregular verbs (webmaster) 366 126
106) Confusing words - Placement test (bridg) 365 737
107) Numbers from 1 to 10 (lucile83) 363 408
108) Present perfect or preterite? (anonyme) 362 045
109) Past perfect simple, past perfect continuous (anonyme) 361 876
110) Present continuous or present simple (webmaster) 361 490
111) Simple Past : regular verbs (anonyme) 357 508
112) Comparative Adjectives (bridg) 353 936
113) Past simple (video) (lucile83) 351 723
114) Who, Whom, Which, or Whose? (anonyme) 351 345
115) Past simple or past continuous (lucile83) 349 111
116) While / When (anonyme) 343 710
117) What time is it? (webmaster) 340 291
118) Modals (tinou) 338 401
119) Modal: may/might (lucile83) 335 561
120) Cardinal and ordinal numbers (anonyme) 330 740
121) The superlative (anonyme) 330 617
122) Possessive adjectives and pronouns (woodyrun) 326 226
123) How to talk about the weather (lili73) 321 162
124) Since and for (lucile83) 321 124
125) Flags (webmaster) 319 491
126) Pronouns (woodyrun) 318 530
127) Irregular verbs (bridg) 318 120
128) Tenses (anonyme) 315 290
129) Prepositions - in, on, at (anonyme) 315 236
130) Placement test 3 (webmaster) 311 910
131) Order of adjectives (webmaster) 308 311
132) Could/Couldn't (laure95) 308 303
133) Comparative (anonyme) 306 522
134) Agreement Tags (webmaster) 305 656
135) Adjectives and prepositions (lucile83) 305 107
136) Asking questions (webmaster) 304 768
137) Present perfect OR simple past? (bridg) 299 772
138) Questions in the past tense (lucile83) 299 704
139) Object pronouns (bridg) 298 665
140) Superlative Adjectives (bridg) 297 878
141) Uncountable nouns (webmaster) 297 748
142) Passive form (anonyme) 296 835
143) Placement test 1 (lucile83) 294 509
144) Present simple (lucile83) 294 355
145) Past perfect (lili73) 294 277
146) Can/Must/Should (laure95) 294 070
147) Prefer/rather (bridg) 291 737
148) Must or Have to? (woodyrun) 290 149
149) The/an/nothing (bridg) 287 072
150) Can and can't (laure95) 285 294
151) To be (anonyme) 284 297
152) Vocabulary: asking and answering (here4u) 280 624
153) Modal verbs (bridg) 278 570
154) Some / Any / no... (bridg) 276 509
155) Days of the week (bridg) 269 629
156) Used to (bridg) 268 037
157) Present continuous (chnawa) 266 571
158) So / neither (anonyme) 265 303
159) Past simple (video) (lucile83) 265 233
160) Should / must (anonyme) 261 948
161) Articles : a / an / the / Ø (anonyme) 261 222
162) Past tense (anonyme) 260 724
163) Comparative and superlative (anonyme) 260 125
164) Find out a quantity (webmaster) 259 205
165) Vocabulary: on the phone (here4u) 258 999
166) Superlative + and adjective (lucile83) 258 824
167) Comparatives (anonyme) 256 161
168) Numbers 1/100 (anonyme) 255 420
169) Modal can (video) (lucile83) 254 220
170) Relatives pronouns (who, which, that...) (anonyme) 248 035
171) A few, a little, few, little (anonyme) 247 888
172) Would rather / would prefer to (anonyme) 246 046
173) Vocabulary: at the restaurant (here4u) 245 821
174) Present continuous and the Going to form (anonyme) 244 128
175) Should/ have to/ must (anonyme) 242 573
176) Have something done (anonyme) 240 456
177) Used to/would (woodyrun) 239 432
178) Future continuous and future perfect. (felin) 238 373
179) The past (webmaster) 238 353
180) How to ask a question in English (bridg) 237 466
181) Countable or Uncountable? (webmaster) 237 302
182) Some / any (younes91) 235 828
183) Pluperfect (webmaster) 235 406
184) I wish, if only (felin) 234 713
185) Should / shouldn't (anonyme) 233 144
186) Present simple or continuous (bridg) 231 126
187) Adjectives - ing and ed (felin) 230 784
188) Hypothesis (webmaster) 229 710
189) Must or mustn't (laure95) 229 077
190) Auxiliary BE (lucile83) 227 300
191) Articles a/an/the/0 (bridg) 227 054
192) Present perfect with Ever - never - (anonyme) 226 995
193) Article The or nothing (anonyme) 226 894
194) Present continuous OR Present simple? (bridg) 226 775
195) Comparison (komiks) 224 934
196) Simple Preterite OR Preterite (BE+ing) (webmaster) 223 480
197) To / in order to / so as to / so that (irish21) 222 460
198) Present perfect (bridg) 220 340
199) Indirect speech (bridg) 219 472
200) What time is it ? (anonyme) 218 335
