Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 778 941
2) Placement test : grammar for beginners (anonyme) 5 993 163
3) A/AN (webmaster) 5 365 811
4) Auxiliary BE (webmaster) 3 224 602
5) Present continuous (webmaster) 2 999 548
6) Present simple (webmaster) 2 915 834
7) Present simple (webmaster) 2 597 882
8) Present continuous (webmaster) 2 435 252
9) Adjectives (webmaster) 2 093 799
10) A/an (anonyme) 2 015 708
11) Present perfect simple (webmaster) 1 644 176
12) Preterite (webmaster) 1 629 129
13) Vocabulary - Placement test (bridg) 1 619 394
14) Preterite (webmaster) 1 448 259
15) Short placement test (webmaster) 1 443 699
16) To be (bridg) 1 406 481
17) What time is it? (webmaster) 1 349 583
18) Present perfect (webmaster) 1 346 716
19) The alphabet in English (webmaster) 1 321 282
20) Adjectives (anonyme) 1 216 123
21) What time is it? (webmaster) 1 208 838
22) Numbers (webmaster) 1 188 662
23) 'A' ou 'An' (anonyme) 1 175 813
24) Two presents: present continuous, present simple (webmaster) 1 149 627
25) To be (bridg) 1 145 743
26) Comparatives / Superlatives (webmaster) 1 104 915
27) Numbers (webmaster) 1 070 982
28) CAN / MUST (webmaster) 1 058 807
29) THE/ A / AN / nothing (webmaster) 1 033 977
30) Comparatives (webmaster) 1 007 352
31) Family life (bridg) 1 001 002
32) Numbers > 100 (webmaster) 986 439
33) Future (going to/will/present continuous) (anonyme) 964 287
34) Plural (webmaster) 955 902
35) Superlatives (webmaster) 875 410
36) Adjectives (anonyme) 874 953
37) Simple present (bridg) 854 142
38) Spelled words N°1 (bridg) 850 320
39) Placement test beginners: Check your spelling (anonyme) 830 158
40) Introducing oneself (webmaster) 827 285
41) Adverbs of frequency (anonyme) 817 720
42) Family (bridg) 784 937
43) General test-End of high school / Beginning of university (webmaster) 782 971
44) Present simple (anonyme) 781 104
45) Frequency adverbs (webmaster) 777 874
46) Present BE + Ving (bridg) 765 271
47) Genitive (webmaster) 723 776
48) Passive form (anonyme) 723 208
49) Family tree (anonyme) 719 540
50) Preterite: simple or continuous? (webmaster) 716 949
51) Placement test (beginners) (lili73) 701 303
52) Past simple or present perfect (anonyme) 694 463
53) Future (webmaster) 676 050
54) 2 Preterites (webmaster) 662 210
55) Present perfect simple (bridg) 661 592
56) Preterite (webmaster) 620 653
57) List of 200 irregular verbs and audio (bridg) 616 207
58) Modals (webmaster) 612 799
59) Spelled words N°2 (bridg) 609 316
60) Height (webmaster) 606 389
61) Modals (webmaster) 605 766
62) Articles a / an / the (anonyme) 596 761
63) Plural forms (bridg) 577 597
64) Nationalities (webmaster) 574 359
65) Past continuous / Past simple (anonyme) 566 746
66) Irregular plurals (bridg) 553 738
67) Two presents: simple and continuous (webmaster) 549 774
68) Preterite (bridg) 549 202
69) Superlatives (frapedur) 539 244
70) Vocabulary: greeting people (here4u) 536 483
71) Give your opinion (bridg) 532 088
72) Adverbs of Frequency (bridg) 517 034
73) Present simple or continuous (anonyme) 511 513
74) Present perfect / preterite ? (anonyme) 509 912
75) Possessive case (anonyme) 480 771
76) Countries & nationalities (bridg) 473 603
77) 'The' or nothing? (webmaster) 471 300
78) Past tenses (bridg) 471 007
79) Introducing oneself (easy) (webmaster) 470 782
80) Passive voice (webmaster) 463 638
81) Present Simple vs. Past Simple (anonyme) 457 586
82) Questions : how to ask them (anonyme) 448 543
83) General Test II / End of high school / Beginning of universi (webmaster) 446 216
84) IN, ON, AT or TO? (webmaster) 445 400
85) Relative pronouns (webmaster) 444 650
86) Comparative of superiority (anonyme) 438 866
87) How to pronounce the final -ED? (past simple) (webmaster) 438 097
88) Relative clauses (webmaster) 423 409
89) Sounds: [h] (webmaster) 419 578
90) Comparative (anonyme) 413 821
91) A/an/Ø (bridg) 398 931
92) Past simple (anonyme) 397 601
93) Future simple (anonyme) 396 502
94) This / That / These / Those (webmaster) 392 599
95) Conditional (webmaster) 391 775
96) Passive voice (anonyme) 390 771
97) Comparing (webmaster) 388 092
98) Can / could/ may/ might (woodyrun) 379 569
99) Present perfect or past tense (anonyme) 377 604
100) Much, many, little and few (felin) 372 971
101) Personal pronouns (anonyme) 371 387
102) Preterite continuous (BE + -ING) (webmaster) 369 439
103) Some, any, no, enough, too/too much/too many (webmaster) 368 174
104) Genitive case (bridg) 368 151
105) Confusing words - Placement test (bridg) 364 556
106) Irregular verbs (webmaster) 363 676
107) Numbers from 1 to 10 (anonyme) 361 574
108) Past perfect simple, past perfect continuous (anonyme) 360 941
109) Present continuous or present simple (webmaster) 359 633
110) Present perfect or preterite? (anonyme) 357 052
111) Simple Past : regular verbs (anonyme) 353 221
112) Comparative Adjectives (bridg) 352 286
113) Who, Whom, Which, or Whose? (anonyme) 348 880
114) Past simple (video) (anonyme) 348 527
115) Past simple or past continuous (anonyme) 342 970
116) While / When (anonyme) 338 918
117) What time is it? (webmaster) 338 013
118) Modals (tinou) 336 614
119) Modal: may/might (anonyme) 334 249
120) Cardinal and ordinal numbers (anonyme) 328 778
121) The superlative (anonyme) 325 694
122) Possessive adjectives and pronouns (woodyrun) 324 263
123) How to talk about the weather (lili73) 320 890
124) Since and for (anonyme) 318 918
125) Flags (webmaster) 317 631
126) Irregular verbs (bridg) 316 080
127) Prepositions - in, on, at (anonyme) 314 159
128) Pronouns (woodyrun) 313 788
129) Tenses (anonyme) 312 026
130) Placement test 3 (webmaster) 310 519
131) Order of adjectives (webmaster) 306 624
132) Could/Couldn't (laure95) 305 919
133) Comparative (anonyme) 304 707
134) Agreement Tags (webmaster) 304 092
135) Adjectives and prepositions (anonyme) 304 071
136) Asking questions (webmaster) 303 136
137) Present perfect OR simple past? (bridg) 298 416
138) Questions in the past tense (anonyme) 297 615
139) Superlative Adjectives (bridg) 295 860
140) Uncountable nouns (webmaster) 295 723
141) Object pronouns (bridg) 295 056
142) Placement test 1 (anonyme) 292 836
143) Passive form (anonyme) 291 473
144) Present simple (anonyme) 291 376
145) Can/Must/Should (laure95) 289 471
146) Prefer/rather (bridg) 289 455
147) Past perfect (lili73) 288 399
148) Must or Have to? (woodyrun) 287 608
149) The/an/nothing (bridg) 285 312
150) To be (anonyme) 283 507
151) Can and can't (laure95) 281 678
152) Vocabulary: asking and answering (here4u) 280 445
153) Modal verbs (bridg) 277 319
154) Some / Any / no... (bridg) 270 574
155) Days of the week (bridg) 269 110
156) So / neither (anonyme) 264 391
157) Past simple (video) (anonyme) 263 762
158) Used to (bridg) 260 374
159) Present continuous (chnawa) 260 315
160) Should / must (anonyme) 259 710
161) Past tense (anonyme) 259 360
162) Vocabulary: on the phone (here4u) 258 736
163) Find out a quantity (webmaster) 258 571
164) Superlative + and adjective (anonyme) 257 273
165) Articles : a / an / the / Ø (anonyme) 257 065
166) Comparative and superlative (anonyme) 255 395
167) Numbers 1/100 (anonyme) 253 673
168) Modal can (video) (anonyme) 253 022
169) Comparatives (anonyme) 248 512
170) Relatives pronouns (who, which, that...) (anonyme) 247 849
171) Vocabulary: at the restaurant (here4u) 245 665
172) A few, a little, few, little (anonyme) 245 416
173) Would rather / would prefer to (anonyme) 244 273
174) Present continuous and the Going to form (anonyme) 242 648
175) Should/ have to/ must (anonyme) 240 019
176) Have something done (anonyme) 239 852
177) The past (webmaster) 237 836
178) Used to/would (woodyrun) 237 673
179) Future continuous and future perfect. (felin) 237 625
180) How to ask a question in English (bridg) 235 472
181) I wish, if only (felin) 234 093
182) Pluperfect (webmaster) 233 965
183) Countable or Uncountable? (webmaster) 233 164
184) Some / any (younes91) 232 921
185) Should / shouldn't (anonyme) 231 551
186) Present simple or continuous (bridg) 230 802
187) Adjectives - ing and ed (felin) 229 110
188) Hypothesis (webmaster) 228 153
189) Auxiliary BE (anonyme) 226 455
190) Articles a/an/the/0 (bridg) 226 298
191) Article The or nothing (anonyme) 225 971
192) Must or mustn't (laure95) 225 666
193) Present perfect with Ever - never - (anonyme) 225 566
194) Present continuous OR Present simple? (bridg) 225 451
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 833
196) To / in order to / so as to / so that (irish21) 220 250
197) Present perfect (bridg) 219 507
198) Comparison (komiks) 218 940
199) What time is it ? (anonyme) 217 655
200) Indirect speech (bridg) 216 656
