Another site:
AllTop 200 most popular tests to learn English...
1) Test de niveau anglais (webmaster) 6 777 211
2) Placement test : grammar for beginners (anonyme) 5 989 690
3) A/AN (webmaster) 5 363 876
4) Auxiliary BE (webmaster) 3 223 629
5) Present continuous (webmaster) 2 998 469
6) Present simple (webmaster) 2 911 935
7) Present simple (webmaster) 2 596 635
8) Present continuous (webmaster) 2 433 024
9) Adjectives (webmaster) 2 093 147
10) A/an (anonyme) 2 014 678
11) Present perfect simple (webmaster) 1 642 073
12) Preterite (webmaster) 1 626 516
13) Vocabulary - Placement test (bridg) 1 618 892
14) Preterite (webmaster) 1 446 389
15) Short placement test (webmaster) 1 443 310
16) To be (bridg) 1 405 856
17) What time is it? (webmaster) 1 348 964
18) Present perfect (webmaster) 1 344 980
19) The alphabet in English (webmaster) 1 320 711
20) Adjectives (anonyme) 1 215 542
21) What time is it? (webmaster) 1 207 641
22) Numbers (webmaster) 1 188 390
23) 'A' ou 'An' (anonyme) 1 175 005
24) Two presents: present continuous, present simple (webmaster) 1 148 911
25) To be (bridg) 1 145 227
26) Comparatives / Superlatives (webmaster) 1 102 921
27) Numbers (webmaster) 1 070 494
28) CAN / MUST (webmaster) 1 058 322
29) THE/ A / AN / nothing (webmaster) 1 033 011
30) Comparatives (webmaster) 1 006 935
31) Family life (bridg) 1 000 535
32) Numbers > 100 (webmaster) 986 157
33) Future (going to/will/present continuous) (anonyme) 963 468
34) Plural (webmaster) 955 531
35) Superlatives (webmaster) 874 961
36) Adjectives (anonyme) 874 561
37) Simple present (bridg) 853 641
38) Spelled words N°1 (bridg) 849 915
39) Placement test beginners: Check your spelling (anonyme) 829 938
40) Introducing oneself (webmaster) 827 032
41) Adverbs of frequency (anonyme) 816 942
42) Family (bridg) 784 545
43) General test-End of high school / Beginning of university (webmaster) 782 553
44) Present simple (anonyme) 779 881
45) Frequency adverbs (webmaster) 777 586
46) Present BE + Ving (bridg) 764 857
47) Genitive (webmaster) 723 391
48) Passive form (anonyme) 719 910
49) Family tree (anonyme) 719 210
50) Preterite: simple or continuous? (webmaster) 716 286
51) Placement test (beginners) (lili73) 700 769
52) Past simple or present perfect (anonyme) 693 420
53) Future (webmaster) 675 750
54) 2 Preterites (webmaster) 661 699
55) Present perfect simple (bridg) 660 118
56) Preterite (webmaster) 620 036
57) List of 200 irregular verbs and audio (bridg) 615 826
58) Modals (webmaster) 612 554
59) Spelled words N°2 (bridg) 609 010
60) Height (webmaster) 606 206
61) Modals (webmaster) 604 966
62) Articles a / an / the (anonyme) 596 747
63) Plural forms (bridg) 577 236
64) Nationalities (webmaster) 574 102
65) Past continuous / Past simple (anonyme) 565 679
66) Irregular plurals (bridg) 553 456
67) Two presents: simple and continuous (webmaster) 549 424
68) Preterite (bridg) 548 783
69) Superlatives (frapedur) 538 025
70) Vocabulary: greeting people (here4u) 536 448
71) Give your opinion (bridg) 531 777
72) Adverbs of Frequency (bridg) 516 817
73) Present simple or continuous (anonyme) 510 382
74) Present perfect / preterite ? (anonyme) 508 874
75) Possessive case (anonyme) 480 443
76) Countries & nationalities (bridg) 473 300
77) 'The' or nothing? (webmaster) 471 131
78) Introducing oneself (easy) (webmaster) 470 632
79) Past tenses (bridg) 470 590
80) Passive voice (webmaster) 462 909
81) Present Simple vs. Past Simple (anonyme) 456 577
82) Questions : how to ask them (anonyme) 448 168
83) General Test II / End of high school / Beginning of universi (webmaster) 446 022
84) IN, ON, AT or TO? (webmaster) 444 918
85) Relative pronouns (webmaster) 444 134
86) Comparative of superiority (anonyme) 438 214
87) How to pronounce the final -ED? (past simple) (webmaster) 437 408
88) Relative clauses (webmaster) 423 110
89) Sounds: [h] (webmaster) 419 420
90) Comparative (anonyme) 413 159
91) A/an/Ø (bridg) 398 553
92) Past simple (anonyme) 396 432
93) Future simple (anonyme) 396 099
94) This / That / These / Those (webmaster) 392 396
95) Conditional (webmaster) 391 468
96) Passive voice (anonyme) 390 224
97) Comparing (webmaster) 387 921
98) Can / could/ may/ might (woodyrun) 379 265
99) Present perfect or past tense (anonyme) 376 957
100) Much, many, little and few (felin) 372 445
101) Personal pronouns (anonyme) 371 255
102) Preterite continuous (BE + -ING) (webmaster) 368 812
103) Some, any, no, enough, too/too much/too many (webmaster) 368 000
104) Genitive case (bridg) 367 838
105) Confusing words - Placement test (bridg) 364 485
106) Irregular verbs (webmaster) 363 432
107) Numbers from 1 to 10 (anonyme) 361 442
108) Past perfect simple, past perfect continuous (anonyme) 360 825
109) Present continuous or present simple (webmaster) 359 480
110) Present perfect or preterite? (anonyme) 356 416
111) Simple Past : regular verbs (anonyme) 352 675
112) Comparative Adjectives (bridg) 352 088
113) Who, Whom, Which, or Whose? (anonyme) 348 623
114) Past simple (video) (anonyme) 348 208
115) Past simple or past continuous (anonyme) 342 001
116) While / When (anonyme) 338 296
117) What time is it? (webmaster) 337 680
118) Modals (tinou) 336 417
119) Modal: may/might (anonyme) 334 076
120) Cardinal and ordinal numbers (anonyme) 328 633
121) The superlative (anonyme) 324 946
122) Possessive adjectives and pronouns (woodyrun) 324 029
123) How to talk about the weather (lili73) 320 869
124) Since and for (anonyme) 318 573
125) Flags (webmaster) 317 460
126) Irregular verbs (bridg) 315 873
127) Prepositions - in, on, at (anonyme) 314 037
128) Pronouns (woodyrun) 313 305
129) Tenses (anonyme) 311 734
130) Placement test 3 (webmaster) 310 328
131) Order of adjectives (webmaster) 306 482
132) Could/Couldn't (laure95) 305 717
133) Comparative (anonyme) 304 373
134) Adjectives and prepositions (anonyme) 303 955
135) Agreement Tags (webmaster) 303 943
136) Asking questions (webmaster) 302 989
137) Present perfect OR simple past? (bridg) 298 255
138) Questions in the past tense (anonyme) 297 407
139) Superlative Adjectives (bridg) 295 668
140) Uncountable nouns (webmaster) 295 507
141) Object pronouns (bridg) 294 639
142) Placement test 1 (anonyme) 292 621
143) Present simple (anonyme) 290 963
144) Passive form (anonyme) 290 483
145) Prefer/rather (bridg) 289 244
146) Can/Must/Should (laure95) 288 976
147) Past perfect (lili73) 287 560
148) Must or Have to? (woodyrun) 287 132
149) The/an/nothing (bridg) 285 089
150) To be (anonyme) 283 421
151) Can and can't (laure95) 281 034
152) Vocabulary: asking and answering (here4u) 280 437
153) Modal verbs (bridg) 277 178
154) Some / Any / no... (bridg) 270 338
155) Days of the week (bridg) 269 087
156) So / neither (anonyme) 264 258
157) Past simple (video) (anonyme) 263 609
158) Used to (bridg) 260 321
159) Present continuous (chnawa) 259 613
160) Should / must (anonyme) 259 470
161) Past tense (anonyme) 259 209
162) Vocabulary: on the phone (here4u) 258 713
163) Find out a quantity (webmaster) 258 499
164) Superlative + and adjective (anonyme) 257 086
165) Articles : a / an / the / Ø (anonyme) 256 401
166) Comparative and superlative (anonyme) 254 827
167) Numbers 1/100 (anonyme) 253 543
168) Modal can (video) (anonyme) 252 890
169) Relatives pronouns (who, which, that...) (anonyme) 247 816
170) Comparatives (anonyme) 247 130
171) Vocabulary: at the restaurant (here4u) 245 645
172) A few, a little, few, little (anonyme) 245 133
173) Would rather / would prefer to (anonyme) 244 183
174) Present continuous and the Going to form (anonyme) 242 476
175) Should/ have to/ must (anonyme) 239 751
176) Have something done (anonyme) 239 700
177) The past (webmaster) 237 734
178) Future continuous and future perfect. (felin) 237 492
179) Used to/would (woodyrun) 237 424
180) How to ask a question in English (bridg) 235 211
181) I wish, if only (felin) 233 997
182) Pluperfect (webmaster) 233 774
183) Countable or Uncountable? (webmaster) 233 064
184) Some / any (younes91) 232 417
185) Should / shouldn't (anonyme) 231 326
186) Present simple or continuous (bridg) 230 784
187) Adjectives - ing and ed (felin) 228 752
188) Hypothesis (webmaster) 228 021
189) Auxiliary BE (anonyme) 226 332
190) Articles a/an/the/0 (bridg) 226 202
191) Article The or nothing (anonyme) 225 836
192) Present perfect with Ever - never - (anonyme) 225 441
193) Present continuous OR Present simple? (bridg) 225 288
194) Must or mustn't (laure95) 225 174
195) Simple Preterite OR Preterite (BE+ing) (webmaster) 222 712
196) To / in order to / so as to / so that (irish21) 219 822
197) Present perfect (bridg) 219 381
198) Comparison (komiks) 217 945
199) What time is it ? (anonyme) 217 590
200) Indirect speech (bridg) 216 357
